Fe₃Li₇O₁₂Ti₂

Architectural potential

A lithium-iron-titanate ceramic fired at 1100 °C — the only load-bearing masonry candidate in this batch, with the iron content also giving it a visible-light absorber behaviour that opens a second argument for thermal-mass use. One hundred megapascals of compression is not primary-frame concrete territory but is comfortably above the traditional structural-brick envelope, so placements are block-work and structural tile in the same register as load-bearing masonry: extruded posts in garden-wall construction, thin-section compressive vaults in pavilion architecture, and structural tile infill in brick-grid façades. The visible-absorber chemistry adds a trombe-wall and thermal-mass argument: south-facing absorber panels where the iron-amber body takes solar gain into itself rather than reflecting it, warm-toned cladding on thermally-active walls, and hypocaust-style floor slabs where the colour doubles as the heat-capture logic. Embodied CO₂ runs nearly three and a half times that of clay brick, so the structural case has to be paid for by the thermal argument or the colour-and-fire-resistance combination. The 1000 g standard batch with a five-kilogram ceiling makes genuinely wall-scale production feasible. The caveat is cost: €51.91 per kilogram batch runs well above clay-brick economics, so the material belongs to signature thermal walls and architectural-statement masonry rather than general block-work.

Material character

The slab reads a warm amber-brown, the iron content sitting as a dissolved colourant that deepens with the 1100 °C fire — closer in tone to a terracotta brick than to a fired stoneware, but denser and more saturated. At 3.77 g/cm³ over 85×85×37 mm the piece is solid in the hand, lifting two-handed for its thickness and ringing clear and high under a tap. Surface vitrified matte with the characteristic skin of a fired iron-ceramic; edges cold-cut, kerf-whitened. Fully opaque. Against a standard clay-brick sibling the body reads darker, denser and noticeably warmer-toned, with a harder, longer ring under a tap.